Oil burner



June 23, 1925.

. 1,543,132 A. E. SWEET OIL BURNER Filed March 6, 1924 gwwnkoz 3&1# /MYK Manuf' Patented .lune 23, 1925.

UNITED STATES j 1,543,132. PATENT OFFICE.

ARTHUR EAR-L'SWEET, OF TACOMA, WASHINGTON, ASSIGNOR TO W. D. TRIPPLE, OF TACOMA, WASHINGTON.

oIL BURNER. l i 'i Application led March 6, 1924. Serial No. 697,218.

VT all whom it may concern:

Beit known that I, ARTHUR EARL SWEET, a citizen ofthe United States of America, and resident of the city of TacomaI in the county of Pierce and State of Washington, have invented certain new and useful lImprovements in Oil Burners, of which the following is a specification.

My invention relates to oil burners of the type employing an expansive liuid, as steam or compressed air, to mingle with the oil and to atomize it prior to its burning, and which include an automatic thermostatic or pressure control.

The particular object of my present invention is to provide a simple and compact means whereby the supply of oil and steam is automatically controlled by the pressure of steam in a boiler heated by such a burner.

A further object is the provision of control valves in the steam and oil lines, which are connected for simultaneous control by the steam from the boiler, and in such manner as to operate reliably.

A further object is the provision of means for adjustment for varying steam pressures and varying valve openings desired.

' Other objects, and those relating to structural details, will appear from a study of the following specilication and claim and of the drawings forming a part hereof, in which my invention is shown in ay preferred form.

The drawing illustrates a longitudinal sectional view through such a burner.

The burner nozzle is connected to a casing which comprises a mixing chamber 1, to receive the mixed steam and oil issuing therefrom through a jet 11. Steam is supplied to a steam chamber 2 through a pipe 21 which is controlled by a cock 22, the steam being drawn from a main supply pipe 23. A steam valve 3, seating at 31 in the casing enclosing the mixing chamber 1, controls communication between the steam chamber 2 and the mixing chamber 1.

Oil is supplied to the mixing chamber 1 from an oil supply pipe 40 past a cock 41 and past a valve 4 seating at 42. Steam passing the valve seat 31 is blown intoy the jet 11 and by the suction created therein in the mixing chamber 1 draws oil thereinto and through the jet 11 to atomize it and to deliver it finally to the burner nozzle 10.

The stem of the valve 3 and the stem 44 of the valve 4,V or whatever other externalvalve-operating ineansmay be employed, are parallel, and are rigidly but adjustably connected. F or accomplishing this purpose yI have shown the stem 30 as threaded. at vinto a coaxial rod 50 which is connected to a piston V5 operating in acylinderrvl. The rod 44 is received in an arm 54 which is rigid with the piston 5 andwhich projects through a slot 52 in the wall of the cylinder 51, being adjustable relative thereto as indi-V cated by the nuts 45. Thus it will be seen that the position of the oil valve 4 relative to the arm 54 and piston 5 can be varied by adjustment of the nuts 45, and the position of the steam valve 3 relative to the piston rod 5() and piston 5 can be varied by adjustment of its threaded end 35 in the piston rod. A set screw 53 or other adjustable stop is positioned in the path of the arm 54 in such manner that it will never permit complete closure of the valves 3 and 4, but will always permit a small pilot light at least to be kept burning. v

The cylinder 51 behind the'piston 5 communicates with the pressure vin the boiler or within the steam supply line 23 by a by-pass 25. This communicates with the steam line 23 above the stop cock 22. I have shown a' drain valve 56 provided to relieve condensation in the cylinder 51.

The cylinder 51 is conveniently supported from the casing 15 by means of a ring-shaped yoke 6 which may be secured to an end of the casing 15 and which contains a packing gland 61 about the valve stem 30 and which may contain an adjusting sleeve 65 about the piston rod 50. This adjusting sleeve bears against a washer 57 against which a spring 58 bears, the spring beingl compressed between the washer 57 and the'piston 5. This construction of the ring-shaped yoke 6, in

the steam pressure in the boiler through the pipe 25 communicating With the cylinder 5l, and thus increasing the -steam pressure upon the piston 5 tends to close the valves 3 and 4. This tendency is resisted by the spring 58 which may be set to close the valves at a predetermined pressure, except as thestop 53 may be set to retain the valves in slightly open position.

What l claim as my invention is:

In an oil burner, a casing having a partition therein forming steam and oil receiving chambers, said partition having a valve port therein and the opposite Walls of the casing having one a nozzle receiving opening and the other a valve stem opening, a valve controlling said port in the casing and having a stem passing through its opening in the cas-ing, a nozzle secured in its opening in the casing, an axially positioned pipe section secured in said nozzle opening and eX- tending into the nozzle, saidV pipe section being of much smaller diameter than the nozzle pipe and placed with one end slightly spaced from and alined with the discharge end of the steam valve, a steam cylinder having a piston therein and a spring acting in opposition to the steam pressure, and means adjustably connecting the piston rod with the stem of the steam valve.

Signed at Tacoma, Pierce County, Washington, this twenty-ninth day of February,

ARTHUR EARL SWEET. 

